In 2006, the Center for Disease Control and Prevention (CDC) Office on Smoking and Health (OSH) funded six Networks to provide leadership and expertise in the development of policy related initiatives (including environmental and systems change) and utilization of proven or potentially promising practices when available or appropriate.  The Networks collaborate with the National Tobacco Control Program (NTCP) which includes OSH, Network members, Network partners, States, and other local and national tobacco control organizations to advance the science and practice of tobacco control in the United States for all members of their population